docs: def tournament_number2name(self, number):
          """Translate tournament number to tournament name.
  
          Args:
              number (int): tournament number to translate
  
          Returns:
              name (str): name of the tournament or `None` if unknown.
  
          Examples:
              >>> NumerAPI().tournament_number2name(4)
              'delta'
              >>> NumerAPI().tournament_number2name(99)
              None
          """
          tournaments = self.get_tournaments()
          d = {t['tournament']: t['name'] for t in tournaments}
          return d.get(number, None)